I constructed a rims system very similar to the brew magic system. I purchased a nice false bottom and stand from norcal brewing solutions. I have a march 809 inline pump. All piping is either 1/2" id copper or 1/2 ss tubing. Problem is I am have major issues with recirculating the mash, seems there is not enough volume to supply pump. The system worked great when I tested it with water. Am I missing something? Any helpful info on re circulating mash will be appreciated..